September 30, 2014 AT 1:00 pm

Once an infamous prison, Alcatraz is now a national park that attracts 1.5 million visitors each year – and Chinese artist Ai Weiwei just teamed up with the FOR-SITE Foundation to unveil a series of 7 provocative installations that engage with the island’s history while exploring the issues of human rights and freedom of expression. “Trace” is one of the most spectacular – Ai Weiwei used 1.2 million LEGO bricks to create portraits of 176 prisoners of conscience and exiles…